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What to check before buying a used iPhone

Felix Nguyen
November 30, 2023

In the quest to acquire a pre-owned iPhone, it is essential to exercise careful consideration to ensure a smooth and satisfying purchase. Before finalizing the transaction, whether from a store or a private seller, it is crucial to conduct a detailed evaluation of the iPhone's physical condition. Pay close attention to the following aspects:

1. Inspect the External Condition:

Case and Screen:

Carefully examine the screen and body for any visible scratches or cracks. These defects not only affect the device's appearance but may also lead to operational issues. Request the removal of any protective coverings to reveal potential imperfections. Test the display's quality, backlighting, and touchscreen responsiveness at maximum brightness.

Bolts and Case:

Check the bolts at the bottom of the case for signs of dents, scratches, or damage. These may indicate unauthorized openings, warranting further investigation.

2. Assess the Camera:

Inspect the camera lens for dust particles, as this may suggest prior disassembly. Take test photos using both front and rear cameras and record a video. Examine the resulting images for discrepancies in color or lighting, indicating potential camera damage.

3. Verify the Model and IMEI:

Ensure consistency between the device, series, and IMEI with the information on the box. Discrepancies may indicate a mismatch between the device and its original packaging.

4. Inspect for Water Exposure:

Use a flashlight to observe the liquid intrusion sensor within the SIM card slot. A silver or white color indicates no liquid exposure, while red indicates moisture ingress, which may compromise the phone.

5. Evaluate Face/Touch ID:

Register your biometric data with Face ID or Touch ID to confirm functionality. Any irregularities in sensor performance should be approached with caution, as they may require a motherboard replacement.

6. Test the Speakers:

Voice Calls:

Place a call to assess the audibility and clarity of your voice and the recipient's. This also helps verify if the phone is locked to a specific cellular provider.

Media Playback:

Play music or a video at maximum volume to check for distortions, crackles, or interference in the sound.

7. Examine the Battery:

Check battery status in Settings. A status below 80% indicates diminished capacity, potentially leading to reduced usage time. Be prepared for a battery replacement if necessary.

8. Test the Charger:

Connect the iPhone to a charger to ensure it charges and displays an increase in battery percentage, especially for models supporting wireless charging.

9. Check Connectivity:

Wi-Fi:

Verify Wi-Fi functionality by connecting to a network, browsing the internet, and ensuring stable connectivity.

LTE (Cellular Data):

Confirm that cellular data functions correctly through web browsing, calls, and text messages.

Bluetooth:

Test Bluetooth connectivity by pairing with another device for data transfer and audio streaming.

Concluding Thoughts:

If the comprehensive assessment, including connectivity checks, reveals no issues, proceed to negotiate with the seller for the purchase of your thoroughly inspected and verified used iPhone. Remember, a diligent examination is crucial to securing a reliable and satisfying ownership experience with a used iPhone.